Traces of Lower Bob A OpP er Bob dis P laced - 



Phil. Mag. Eer. 6, Vol. 39. PI. VII. 



fftvm 



Traces of Lower 



ii»ii 



pv^^fUW^j 



^AiHWrwv^rvW^ 



Lower Bob displaced. 



a/wWWWWHa AMA/ANV 



